On a hive fronting no swarm name, swarm-services-cert's token-less
GET pki/ca/pem presents baoHiveIdentity{Cert,Key}File again. The fetch
never logs in and grants nothing; the client certificate only completes
the store listener's mTLS. A hive host without the store therefore needs
no copy of the services-issuer pair.
The issue path, which logs in to pki/issue/swarm-services, still presents
only deploy.bao.servicesIssuerClient{Cert,Key}File.
module-eval-hive-tls: the root-fetch cases pin the hive identity and the
absence of the services-issuer pair (a fixture holding both, and one
holding only the hive identity); the issue-path case pins the pair on a
hive host and on a host without a hive; a gateway without the pair
evaluates and its issue path names both options.
Root-fetch identity: option (a), mara on PR #5002 (comment 92591).
Refs #4921
a66670be87